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Finding the Fourth Proportional to 18,583.60, 25,578.60 and 16,811.44

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Solution

The fourth proportional to 18,583.60, 25,578.60 and 16,811.44 is: 23,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,583.60 : 25,578.60 = 16,811.44 : x
  2. Step 2: Convert to fraction form
    18,583.60/25,578.60 = 16,811.44/x
  3. Step 3: Cross multiply
    18,583.60x = 25,578.60 × 16,811.44
  4. Step 4: Simplify right side
    18,583.60x = 430,013,099.18
  5. Step 5: Solve for x
    x = 430,013,099.18/18,583.60
  6. Step 6: Final answer
    x = 23,139.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.